Furnace-grate



( 0 Model.) I

J- CONE.

FURNACE GRATE.

No. 380,312. Patented Apr. 3, 1888.

UNITED STATES EEicE.

PATENT FURNACE-G RATE.

SPECIFICATION forming part of Letters Patent No. 380,312, dated April 3, 1888.

(No moduli T0 a-ZZ whom it may concern:

Be it known that I, JONATHAN GONE, of the city and county of Philadelphia and State of Pennsylvania, have invented an Improvement in Furnace-Grates, of which the following is a specification.

My invention has reference to furnace grates; and it consists in certain improvements, all of which are fully set forth in the following specification, and shown in the accompanying drawings, which form part thereof.

The object of my invention is to provide a suitable grate for furnaces, especially those of steam-boilers, which shall admit of the bars thereof being rocked, and at the same time caused to rise and fall to a slight extent, whereby the grate may be kept clear of all clinkers and a most intense heat produced with a minimum consumption of fuel.

In carrying out my invention I form the grate-bar supports with triangular projections which fit into recesses on the ends of the grate-bars, and by which said bars are supported. The bars are made in cross-section, like an inverted U, the space between the side webs being formed with draft-apertures. The top faces of the bars are transversely grooved to form air-passages under the coal resting on the bars. The peculiar construction of the supports for the bars admits of their being rocked and at the same time caused to rise and fall, crushing all clinkers between the bars and keeping a clear fire.

In the drawings, Figure 1 is a cross-section ofa grate embodying my invention on line 2 z of Fig. 4. Fig. 2 is a plan View of one of the grate-bars. Fig. 3 is a side elevation of same. Fig. 4. is a sectional elevation of one end of same and its support on line a: a: of Fig. 5. Fig. 5 is a cross-section of Fig. 4. on line g Fig. 6 is a perspective view of one of the gratebar supports; and Fig. 7 is a cross-section, showing a construction of support for one end of the bar to insure its righting itself.

A are the grate-bars.

B are the supporting-bars, having the bearings 0, formed with three points of support, 0, arranged like the points of a triangle, and upon which the grate-bars A rest. The grate-bars A are made in crosssection, like an inverted U, the webs H thereof giving great strength. These webs at the ends of the bar terminate in the guides D, which unite at the top to form the substantially-curved recessed supportingfaoe, preferably having the angular face a, which rests upon the edges 0 of the bearings G. The ends of the bars may have square parts I, whereby they may be rocked; or where such a construction is impracticable, owing to the nature of the furnace'setting, the bars may have the cranked parts 1, which extend down and out and by which they may be rocked. It is customary with me to rock these bars one at a time. The upper surfaces of these bars are formed with transverse grooves e, producing ridges F, which act to hold the coal up and allow the air to freely pass beneath.

G are air-holes formed through the bars, and one in each of the grooves 6, but staggered so as not to weaken the bar and also to more uniformly distribute the air. As shown in Figs. 4 and 5, these air-passages G are larger at the bottom than at the top to allow of any ashes or clinkers entering them to pass freely down into the ash-pit.

The supports shown in Fig. 7, having flat surfaces, with the bearing-face of the bar to correspond, may be used, if desired, at the rear end of the bar to insure its being properly righted after shaking. In light bars it would be found desirable; but in long heavy bars both ends of the bar and the front and rear supports may be made alike.

In operating this grate we will have a gratebar rocking between two stationary bars, and in the act of rocking the bar will approach and recedefromsaid stationarybars,crushingdown any clinkers which may exist. This action is also facilitated by the transverse ridges F. In rocking upon its supports 0 there will also be a slight rise and fall to the grate-bar, which increases the cleaning action. The supports 0, having only three points or lines of contact with the bars, offer but little friction to the movement of said bars, thereby allowing of large bars being used. Further, the doubleweb construction of bar gives great strength with but small depth and allows the same to be more easily molded.

While I prefer the construction shown, I do not limit myself to the smaller details, as they may be modified without departing from my invention.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a furnace-grate, the bar-supports provided with triangularly-arranged supportingedges, in combination with grate-bars having their ends upwardly recessed to fit over said supports, whereby said grate-bars may be independently rocked upon their supports with small amount of friction, substantially as and for the purpose specified.

2. In a furnace-grate, the combination of the supportingbars B, having the supports 0, formed with the bearing-edges c, and the bars A, formed with upwardly-recessed bearings, having angular faces a at their ends to rest upon the supports 0, and also with meansto rock to rest upon said supports.

Invtestimony of which invention I hereunto set my. hand.

JONATHAN CONE.

Witnesses:

R. M. HUNTER, FRANK A. MULLIKIN. 

